2003-2007 Chevrolet Silverado and GMC Sierra extended cab
Amazon.com: 2 Pair 6" 6.5" Inch Car Door Speaker Install Adapter Mount Bracket Plates with Speaker Wire Connectors- for 2008-2013 Chevrolet Silverado + for 08-13 GMC Sierra - Extended Cab Models Only : Electronics
Amazon.com: NuIth Aftermarket Front & Rear Door Speaker Adapter Spacer Ring for GM GMC 2006-2019, Chevy 2006-2021, Cadillac 2007-2014 Vehicles 6.5 Inch Speaker Bracket Installation 2 Pack : Electronics
2007-2013 Chevrolet Silverado and GMC Sierra Crew Cab
Install Aftermarket Speakers in 07-13 GM Truck - No Adapters Needed! - Silverado and Sierra - YouTube